Screw



FIG. 1 is a top plan view of the screw;

FIG. 2 is a front view of the screw,

FIG. 3 is a side view of the screw;

FIG. 4 is a rear view of the screw;

FIG. 5 is the opposite side of the screw;

FIG. 6 is a bottom plan view of the screw;

FIG. 7 is a cross sectional view taken along section line 7—7 of the screw in FIG. 4;

FIG. 8 is an enlarged view of the circumscribed area 8 in FIG. 7, illustrating the tooth flank angle of the screw; and,

FIG. 9 is an isometric view of the screw. 

I claim, the ornamental design for a screw, as shown and described. 